New York City Mayor Rudolph Giuliani warns that death toll will be in the thousands.

10:50am

President Bush calls attacks an 'act of war.'

10:54am

CNN reports that two phone calls from al Qaeda members referring to attacks have been intercepted.

11:20am

FAA does not allow air travel to resume at noon.

1:00pm

FBI takes several people in Boston and Florida into custody for questioning.

1:20pm

Taliban officials ask the US to not attack Afghanistan.

2:15pm

Morgan Stanley says the 'vast majority' of its World Trade Center employees are safe.

2:20pm

FAA allows planes diverted on Tuesday to finish their flights.

2:57pm

White House claims to have credible information that Air Force One and White House were targets.

3:40pm

US Attorney General John Ashcroft says there were 3-6 hijackers per plane, armed with knives and box cutters, some terrorists trained as pilots in the US, and calls investigation most massive in US history.

4:00pm

NATO announces it will back US military action, says 'when one member is attacked, then all members are attacked.'

5:20pm

Rescue workers are evacuated from World Trade Center area due to partial collapse of One Liberty Plaza, Nasdaq's new headquarters.

5:45pm

Relatives of United Airlines Flight 93 crash victim Jeremy Glick say he called them from the plane and said people on the flight intended to attempt to stop the hijackers.